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Constenla M, Soler-Membrives A, Besada V, Carrassón M. Impact assessment of a large river on the sediments and fish from its continental shelf: using Solea solea as sentinel in the Ebro river mouth (NW Mediterranean, Spain). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:15713-15728. [PMID: 34636002 PMCID: PMC11543745 DOI: 10.1007/s11356-021-16408-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 09/04/2021] [Indexed: 06/13/2023]
Abstract
Many studies have been carried out along mighty rivers with heavily industrialized watersheds to evaluate pollutants and their effects on freshwater organisms. However, their impact on marine organisms is virtually unknown. In order to cover this gap, Solea solea, one of the most important commercial fish species, together with sediments, were sampled during 2013-2015 offshore from the Ebro Delta river mouth. Fish health indicators (condition indices, histological tissue alterations, and parasite descriptors) were used to assess the potential effect of pollutants, an issue of particular interest in the area following the dredging activities taking place in the river upstream in 2013. No major histopathological alterations were detected, but perivascular inflammatory foci (PIF) were frequently observed, especially in 2014. The most prevalent and abundant parasites were acanthocephalans and digeneans within the digestive tract and copepods on the gills. Levels of trace metals from sediments and fish muscle were below the effects range median and reference levels accepted for human consumption, respectively. However, the lower levels of the hepatosomatic index, higher numbers of PIF, and variations in the abundance of parasites in 2014 and 2015 could suggest a pollutant exposure during these years. These results warn signs of toxicity, which could be associated with sediment leaks during the dredging activities.
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Affiliation(s)
- Maria Constenla
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain.
| | - Anna Soler-Membrives
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain
| | - Victoria Besada
- Instituto Español de Oceanografía, IEO, Centro Oceanográfico de Vigo, Subida a Radio Faro, 50, 36390, Vigo, Spain
| | - Maite Carrassón
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain
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Chinnadurai S, de Campos CJA, Geethalakshmi V, Kripa V, Mohamed KS. Baseline health risk assessment of trace metals in bivalve shellfish from commercial growing areas in the estuaries of Ashtamudi and Vembanad (Kerala, India). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:68338-68348. [PMID: 34272665 DOI: 10.1007/s11356-021-15284-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
Trace metal concentrations were monitored in the yellow clam (Paphia malabarica), green mussel (Perna viridis) and edible oyster (Crassostrea madrasensis) from growing areas in the Ashtamudi and Vembanad estuaries, Kerala. Samples of shellfish (clams n=26, mussels n=18, oysters n=36) and environmental parameters (salinity, temperature, pH and rainfall) were measured in these growing areas from July 2012 to December 2014. Ranges of mean annual concentrations (mg/kg) were Ni (0.46-0.65); Co (2.87-3.49); Fe (80.0-119.4); Mn (3.88-9.38); Zn (40.8-76.2); Pb (1.28-2.00); and Cu (1.59-4.38). In Ashtamudi, clams had higher mean concentrations of Ni, Co, Fe, Mn and Pb than oysters. Mean concentrations of Ni, Pb (in all species), Zn (in clams and mussels) and Cu (in mussels) did not exceed maximum permissible limits mandated by the Food Safety and Standards Authority of India. Mean Mn concentrations exceeded the World Health Organization guideline (1 mg/kg) in the three species while mean Fe concentrations in clams and oysters did not exceed the guideline (100 mg/kg). Target hazard quotients were generally ≤ 1, except for a few Pb results in clams and mussels. Although results suggest no health risk to consumers for the reference doses, daily intakes and elements considered, regular monitoring of trace metals is recommended to maintain consumer protection given increasing anthropogenic and climatic pressures on the shellfish growing areas.
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Affiliation(s)
- Shunmugavel Chinnadurai
- Molluscan Fisheries Division, ICAR - Central Marine Fisheries Research Institute, PB No. 1603, Kochi, Kerala State, 682018, India.
- Fishing Technology Division, ICAR - Central Institute of Fisheries Technology, Kerala State, Kochi, 682029, India.
- Department of Biosciences, Mangalore University, Mangalagangothri, Karnataka State, India.
| | | | - Vaidhyanathan Geethalakshmi
- Fishing Technology Division, ICAR - Central Institute of Fisheries Technology, Kerala State, Kochi, 682029, India
| | - Vasant Kripa
- Molluscan Fisheries Division, ICAR - Central Marine Fisheries Research Institute, PB No. 1603, Kochi, Kerala State, 682018, India
| | - Kolliyil Sunil Mohamed
- Molluscan Fisheries Division, ICAR - Central Marine Fisheries Research Institute, PB No. 1603, Kochi, Kerala State, 682018, India
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Saravanan K, Kiruba-Sankar R, Khan MJ, Hashmi AS, Velmurugan A, Haridas H, Prakasan S, Deepitha RP, Laxmi MNV. Baseline assessment of marine debris with soil, sediment, and water quality characteristics from the fish landing centres of South Andaman, Andaman archipelago, India. MARINE POLLUTION BULLETIN 2021; 172:112879. [PMID: 34464820 DOI: 10.1016/j.marpolbul.2021.112879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 08/11/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
The present study investigates the issue of marine debris and the associated soil, sediment, water quality, and microbial load from the fish landing centres (Junglighat, Chatham, Wandoor, and Guptapara) of South Andaman. The results revealed that significantly (P < 0.05) higher number and weight of marine debris was found in urban landing centres such as Chatham (21.26 ± 1.03 numbers/m2) and Junglighat (268.16 ± 27.00 g/m2), respectively. Plastic debris was found to be the most abundant type of debris, among which plastic bags were dominant. Better soil, sediment, and water quality parameters were observed in rural landing centres such as Wandoor and Guptapara, whereas microbial load was found to be higher in urban landing centres. The study recommends the imperative need to generate awareness on better management practices among the stakeholders to deal with the issue of marine debris and to aim sustainable management of the coastal environment.
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Affiliation(s)
- K Saravanan
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - R Kiruba-Sankar
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India.
| | - Md Junaid Khan
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - Aqsa Siraj Hashmi
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - A Velmurugan
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - Harsha Haridas
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India; ICAR-Central Institute of Fisheries Education, Powarkheda Research Centre, Hoshangabad 461110, Madhya Pradesh, India
| | - Sreepriya Prakasan
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - R P Deepitha
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - M Naga Venkat Laxmi
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
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Dynamics of Vibrio cholerae in a Typical Tropical Lake and Estuarine System: Potential of Remote Sensing for Risk Mapping. REMOTE SENSING 2021. [DOI: 10.3390/rs13051034] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Vibrio cholerae, the bacterium responsible for the disease cholera, is a naturally-occurring bacterium, commonly found in many natural tropical water bodies. In the context of the U.N. Sustainable Development Goals (SDG) targets on health (Goal 3), water quality (Goal 6), life under water (Goal 14), and clean water and sanitation (Goal 6), which aim to “ensure availability and sustainable management of water and sanitation for all”, we investigated the environmental reservoirs of V. cholerae in Vembanad Lake, the largest lake in Kerala (India), where cholera is endemic. The response of environmental reservoirs of V. cholerae to variability in essential climate variables may play a pivotal role in determining the quality of natural water resources, and whether they might be safe for human consumption or not. The hydrodynamics of Vembanad Lake, and the man-made barrier that divides the lake, resulted in spatial and temporal variability in salinity (1–32 psu) and temperature (23 to 36 °C). The higher ends of this salinity and temperature ranges fall outside the preferred growth conditions for V. cholerae reported in the literature. The bacteria were associated with filtered water as well as with phyto- and zooplankton in the lake. Their association with benthic organisms and sediments was poor to nil. The prevalence of high laminarinase and chitinase enzyme expression (more than 50 µgmL−1 min−1) among V. cholerae could underlie their high association with phyto- and zooplankton. Furthermore, the diversity in the phytoplankton community in the lake, with dominance of genera such as Skeletonema sp., Microcystis sp., Aulacoseira sp., and Anabaena sp., which changed with location and season, and associated changes in the zooplankton community, could also have affected the dynamics of the bacteria in the lake. The probability of presence or absence of V. cholerae could be expressed as a function of chlorophyll concentration in the water, which suggests that risk maps for the entire lake can be generated using satellite-derived chlorophyll data. In situ observations and satellite-based extrapolations suggest that the risks from environmental V. cholerae in the lake can be quite high (with probability in the range of 0.5 to 1) everywhere in the lake, but higher values are encountered more frequently in the southern part of the lake. Remote sensing has an important role to play in meeting SDG goals related to health, water quality and life under water, as demonstrated in this example related to cholera.
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Çağlak E, Karsli B, Koral S. The Effect of Depuration on Metals, Bacteria, and Nutrition in Venus verrucosa from the Aegean Sea: Benefit and Risk for Consumer Health of Warty Venus. JOURNAL OF AQUATIC FOOD PRODUCT TECHNOLOGY 2020. [DOI: 10.1080/10498850.2020.1774691] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Emre Çağlak
- Faculty of Fisheries, Department of Processing Technology, Recep Tayyip Erdogan University, Rize, Turkey
| | - Barış Karsli
- Faculty of Fisheries, Department of Processing Technology, Recep Tayyip Erdogan University, Rize, Turkey
| | - Serkan Koral
- Faculty of Fisheries, Department of Processing Technology, İzmir Katip Çelebi University, Izmir, Turkey
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Equbal J, Lakra RK, Savurirajan M, Satyam K, Thiruchitrambalam G. Testing performances of marine benthic biotic indices under the strong seasonality in the tropical intertidal habitats, South Andaman, India. MARINE POLLUTION BULLETIN 2018; 135:266-282. [PMID: 30301038 DOI: 10.1016/j.marpolbul.2018.07.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 07/05/2018] [Accepted: 07/11/2018] [Indexed: 06/08/2023]
Abstract
Understanding the natural variability and its influence on the performance of marine biotic indices used for the health assessment of marine ecosystem is the prime concern. This study addresses the seasonal variability of univariate and multimetric indices by using macrobenthic data collected from three intertidal habitats for two years (July 2013-July 2015). The univariate indices viz., abundance, richness, Shannon index and ES (100) showed strong seasonal variability. For the multimetric indices, the seasonal variability was low and appeared site specific. W-statistics, AMBI and M-AMBI showed highest constancy whilst BENTIX and BOPA exhibited wide - ranging. A general tendency could be inferred as majority of indices showed improvement in benthic quality (poor - moderate and good - high) from turbulent monsoon to stable dry period. The results are discussed concerning possible consequences especially related to the benthic community and biotic indices in intertidal habitats under the influence of sewage discharge and monsoonal effects.
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Affiliation(s)
- Jawed Equbal
- Department of Ocean Studies and Marine Biology, Pondicherry University, Port Blair 744112, Andaman Islands, India
| | - Raj Kiran Lakra
- Department of Ocean Studies and Marine Biology, Pondicherry University, Port Blair 744112, Andaman Islands, India
| | - M Savurirajan
- Department of Ocean Studies and Marine Biology, Pondicherry University, Port Blair 744112, Andaman Islands, India
| | - Kunal Satyam
- Department of Ocean Studies and Marine Biology, Pondicherry University, Port Blair 744112, Andaman Islands, India
| | - Ganesh Thiruchitrambalam
- Department of Ocean Studies and Marine Biology, Pondicherry University, Port Blair 744112, Andaman Islands, India..
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Dong ZG, Chen YH, Ge HX, Li XY, Wu HL, Wang CH, Hu Z, Wu YJ, Fu GH, Lu JK, Che H. Response of growth and development of the Pacific oyster (Crassostrea gigas) to thermal discharge from a nuclear power plant. BMC Ecol 2018; 18:31. [PMID: 30189862 PMCID: PMC6127899 DOI: 10.1186/s12898-018-0191-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 09/03/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND During electricity generation of nuclear power plant, heat energy cannot be completely converted into electrical energy, and a part of it is lost in the form of thermal discharge into the environment. The thermal discharge is harmful to flora and fauna leading to environmental deterioration, biological diversity decline, and even biological extinction. RESULTS The present study investigated the influence of thermal discharge from a nuclear power plant on the growth and development of Pacific oyster Crassostrea gigas which is widely used as bio indicator to monitor environmental changes. The growth of soft part and the gonad development of oysters were inhibited due to thermal discharge. During winter season, temperature elevation caused by thermal discharge promoted the growth of oyster shells. During summer season, the growth rate of oysters in thermal discharge area was significantly lower than that of the natural sea area. CONCLUSIONS The results of this study provided a better understanding of assessing the impact of thermal discharge on the marine ecological environment and mariculture industry. It also provided a scientific basis for defining a safe zone for aquaculture in the vicinity of nuclear power plants.
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Affiliation(s)
- Zhi-Guo Dong
- Jiangsu Key Laboratory of Marine Bioresources and environment, Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology, Lianyungang, 222005, Jiangsu, China. .,Co-Innovation Center of Jiangsu Marine Bioindustry Technology, Lianyungang, 222042, Jiangsu, China.
| | - Yi-Hua Chen
- Jiangsu Key Laboratory of Marine Bioresources and environment, Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology, Lianyungang, 222005, Jiangsu, China.,Co-Innovation Center of Jiangsu Marine Bioindustry Technology, Lianyungang, 222042, Jiangsu, China
| | - Hong-Xing Ge
- Jiangsu Key Laboratory of Marine Bioresources and environment, Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology, Lianyungang, 222005, Jiangsu, China.,Co-Innovation Center of Jiangsu Marine Bioindustry Technology, Lianyungang, 222042, Jiangsu, China
| | - Xiao-Ying Li
- Jiangsu Key Laboratory of Marine Bioresources and environment, Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology, Lianyungang, 222005, Jiangsu, China.,Co-Innovation Center of Jiangsu Marine Bioindustry Technology, Lianyungang, 222042, Jiangsu, China
| | - Hai-Long Wu
- Jiangsu Key Laboratory of Marine Bioresources and environment, Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology, Lianyungang, 222005, Jiangsu, China.,Co-Innovation Center of Jiangsu Marine Bioindustry Technology, Lianyungang, 222042, Jiangsu, China
| | - Chen-He Wang
- Jiangsu Key Laboratory of Marine Bioresources and environment, Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology, Lianyungang, 222005, Jiangsu, China
| | - Zhe Hu
- Jiangsu Key Laboratory of Marine Bioresources and environment, Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology, Lianyungang, 222005, Jiangsu, China
| | - Yang-Jian Wu
- Jiangsu Key Laboratory of Marine Bioresources and environment, Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology, Lianyungang, 222005, Jiangsu, China
| | - Guang-Hui Fu
- Lianyungang City Marine and Fishery Development Promotion Center, Lianyungang, 222000, Jiangsu, China
| | - Ji-Kun Lu
- Lianyungang City Marine and Fishery Development Promotion Center, Lianyungang, 222000, Jiangsu, China
| | - Hua Che
- Lianyungang Muyang Aquaculture Co., Ltd., Lianyungang, 222042, Jiangsu, China
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Kaviarasan T, Gokul MS, Henciya S, Muthukumar K, Dahms HU, James RA. Trace Metal Inference on Seaweeds in Wandoor Area, Southern Andaman Island. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 100:614-619. [PMID: 29497790 DOI: 10.1007/s00128-018-2305-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 02/24/2018] [Indexed: 06/08/2023]
Abstract
Trace metals concentrations were studied for three different seasons on four seaweed species (Halimeda gracilis, Padina pavonica, Sargassum swartzii and Turbinaria ornata) from Wandoor area of southern Andaman Island. Though diversified seaweed population records in the study area, the studied four species were predominantly present in all the seasons. The observed average levels on trace metals concentrations were Cd 0-0.311 µg/g, Cr 0.002-0.334 µg/g, Cu 0.003-0.291 µg/g, Mn 0.118-7.736 µg/g, Pb 0-0.165 µg/g and Zn 0.019-5.537 µg/g respectively. Brown seaweed P. pavonica showed higher level of Mn concentration as 7.73 µg/g during northeast monsoon reflects physiological properties and sequestrative nature. Our result suggests, the metal concentrations were not higher with reference to Dadolahi's metal pollution index. Based on univariate analysis of variance, there is no significant variation found in both species and seasons. To maintain the tradition of the study area, continues monitoring is essential for better understanding and ecosystem conservation.
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Affiliation(s)
- Thanamegam Kaviarasan
- Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India
| | - Murugaiah Santhosh Gokul
- Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India
| | - Santhaseelan Henciya
- Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India
| | - Krishnan Muthukumar
- Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India
| | - Hans-Uwe Dahms
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan, ROC.
| | - Rathinam Arthur James
- Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India.
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Wang X, Wang M, Xu J, Jia Z, Liu Z, Wang L, Song L. Soluble adenylyl cyclase mediates mitochondrial pathway of apoptosis and ATP metabolism in oyster Crassostrea gigas exposed to elevated CO 2. FISH & SHELLFISH IMMUNOLOGY 2017; 66:140-147. [PMID: 28476673 DOI: 10.1016/j.fsi.2017.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 04/16/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
Ocean acidification (OA) has deleterious impacts on immune response and energy homeostasis status of Mollusca. In the present study, the apoptosis ratio of hemocytes and the adenosine triphosphate (ATP) allocation in gill tissues were determined after Pacific oysters Crassostrea gigas were exposed to elevated CO2 environment (pH = 7.50) for 16 days.The apoptosis ratio in CO2 exposure group (35.2%) was significantly higher (p < 0.05) than that in the control group, and the increased apoptosis ratio induced by elevated CO2 could be significantly inhibited (p < 0.05) by KH7, a specific inhibitor of a bicarbonate sensor soluble adenylyl cyclase (sAC). After CO2 exposure, sAC in oyster (CgsAC) was found to be clustered with mitochondria in the cytoplasm, and the pro-caspase-3 was cleaved into two small fragments. Moreover, the activities of caspase-3 and caspase-9 also increased post CO2 exposure and these increases could be inhibited by KH7. However, the activities of caspase-8 did not change significantly compared with that in the control group. After CO2 exposure, the ATP content in the gill increased significantly (p < 0.05) and such increase could also be inhibited by KH7. The ATP content in purified gill mitochondria decreased significantly (p < 0.05) after CO2 exposure, which was also inhibited by KH7. These results implied that the elevated CO2 could activate the mitochondria-CgsAC pathway of apoptosis and ATP metabolism in oyster, and this pathway played essential roles in maintaining the homeostasis and the balance of energy metabolism in response to OA.
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Affiliation(s)
- Xiudan Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Functional Laboratory of Marine Fisheries Science and Food Production Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mengqiang Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Jiachao Xu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhihao Jia
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhaoqun Liu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Linsheng Song
- Functional Laboratory of Marine Fisheries Science and Food Production Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian 116023, China.
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Wang X, Wang M, Jia Z, Qiu L, Wang L, Zhang A, Song L. A Carbonic Anhydrase Serves as an Important Acid-Base Regulator in Pacific Oyster Crassostrea gigas Exposed to Elevated CO 2: Implication for Physiological Responses of Mollusk to Ocean Acidification. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2017; 19:22-35. [PMID: 28204970 DOI: 10.1007/s10126-017-9734-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 12/24/2016] [Indexed: 06/06/2023]
Abstract
Carbonic anhydrases (CAs) have been demonstrated to play an important role in acid-base regulation in vertebrates. However, the classification and modulatory function of CAs in marine invertebrates, especially their responses to ocean acidification remain largely unknown. Here, a cytosolic α-CA (designated as CgCAII-1) was characterized from Pacific oyster Crassostrea gigas and its molecular activities against CO2 exposure were investigated. CgCAII-1 possessed a conserved CA catalytic domain, with high similarity to invertebrate cytoplasmic or mitochondrial α-CAs. Recombinant CgCAII-1 could convert CO2 to HCO3- with calculated activity as 0.54 × 103 U/mg, which could be inhibited by acetazolamide (AZ). The mRNA transcripts of CgCAII-1 in muscle, mantle, hepatopancreas, gill, and hemocytes increased significantly after exposure to elevated CO2. CgCAII-1 could interact with the hemocyte membrane proteins and the distribution of CgCAII-1 protein became more concentrated and dense in gill and mantle under CO2 exposure. The intracellular pH (pHi) of hemocytes under CO2 exposure increased significantly (p < 0.05) and CA inhibition reduced the pHi value. Besides, there was no increase in CA activity in gill and mantle after CO2 exposure. The impact of CO2 exposure on CA activity coupled with the mRNA expression level and protein translocation of CgCAII-1 provided evidences that CgCAII-1 could respond to ocean acidification and participate in acid-base regulation. Such cytoplasmic CA-based physiological regulation mechanism might explain other physiological responses of marine organisms to OA.
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Affiliation(s)
- Xiudan Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mengqiang Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Zhihao Jia
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Limei Qiu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Anguo Zhang
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Linsheng Song
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China.
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